1)5(х+2)=2(12-х)
5х+10=24-2х
5х+2х=24-10
7х=14
х=14:7
х=2
2)2(4-3х)+3(х-2)=3
8-6х+3х-6=3
6х-3х=3-8+6
3х=-1
х=-1/3
3)3(х+1)=2(1-х)+6
3х+3=2-2х+6
3х+2х=2+6-3
5х=5
х=5:5
х=1
4)5,4(0,5х+4)=8,1(4+х)
2,7х+21,6=32,4+8,1х
2,7х-8,1х=32,4-21,6
-5,4х=10,8
х=10,8:(-5,4)
х=-2
5)33х-8(3х-2)=-7х-5(12-3х)
33х-24х+16=-7х-60+15х
9х+16=8х-60
9х-8х=-60-16
х=-76
6)0,15(х-4)=9,9-0,3(х-1)
0,15х-0,6=9,90,3х+0,3
0,15х-0,6=10,2-0,3х
0,15х+0,3х=10,2+0,6
0,45х=10,8
х=24
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Answers & Comments
1)5(х+2)=2(12-х)
5х+10=24-2х
5х+2х=24-10
7х=14
х=14:7
х=2
2)2(4-3х)+3(х-2)=3
8-6х+3х-6=3
6х-3х=3-8+6
3х=-1
х=-1/3
3)3(х+1)=2(1-х)+6
3х+3=2-2х+6
3х+2х=2+6-3
5х=5
х=5:5
х=1
4)5,4(0,5х+4)=8,1(4+х)
2,7х+21,6=32,4+8,1х
2,7х-8,1х=32,4-21,6
-5,4х=10,8
х=10,8:(-5,4)
х=-2
5)33х-8(3х-2)=-7х-5(12-3х)
33х-24х+16=-7х-60+15х
9х+16=8х-60
9х-8х=-60-16
х=-76
6)0,15(х-4)=9,9-0,3(х-1)
0,15х-0,6=9,90,3х+0,3
0,15х-0,6=10,2-0,3х
0,15х+0,3х=10,2+0,6
0,45х=10,8
х=24